lets say you are comparing a single turbo that has 400rwhp and a sequntial setup with about 360rwhp...is it possible that the sequential be able to be just as from from a stop to 100? the sequential turbo has lots of power down low so would that dyno curve down low help it stay with a single that has more power?

 

Wrong section first off, and second no. Thats a power diffrence of 40rwhp, if you have equal drivers and equal conditions, the single 400rwhp will leave the 360rwp rx7 behind.

-Alex

 

correct... the singles are (relatively) bad down low, but good up top.... BUT, for a 0-100 run you will only use that low power band once (in 1st gear)... every other gear you should be high enought in revs that the single would come out on top.

but is 0-100 really a good test? if guess if you are drag racing then yes. but what about under other circumstances (ie, you are either on a track, or driving down the highway and some guy pulls up next to you). id imagine for the track an exponential power curve would NOT be optimal... on the other hand if youre racing the locals on the highway, id imaging a preemptive downshift would be all that is needed to make the single a better choice. depends on your needs, the boost you are wanting to run, and the single that you choose.

 

Right, the reason why is that proper launch and shifting will keep both engines in their optimal RPM range at all times. A single turbo at 400hp will have a 40hp advantage the whole way if the driver uses the best shift points.

Twins have the advantage of better streetability and fast response.

Dave

 

Twins have great response from 2000 rpm, but my single (T04S) has awesome response from 3500... as long as I'm in my proper RPM range, I have no fear of any twins beating me.

 

Check this out:
https://www.rx7club.com/showthread.php?t=246991